OAEPParameterSpec (Java SE 15 & JDK 15) (original) (raw)

All Implemented Interfaces:

[AlgorithmParameterSpec](../../../java/security/spec/AlgorithmParameterSpec.html "interface in java.security.spec")

public class OAEPParameterSpec extends Object implements AlgorithmParameterSpec

This class specifies the set of parameters used with OAEP Padding, as defined in thePKCS#1 v2.2 standard. Its ASN.1 definition in PKCS#1 standard is described below:

RSAES-OAEP-params ::= SEQUENCE { hashAlgorithm [0] HashAlgorithm DEFAULT sha1, maskGenAlgorithm [1] MaskGenAlgorithm DEFAULT mgf1SHA1, pSourceAlgorithm [2] PSourceAlgorithm DEFAULT pSpecifiedEmpty }

where

HashAlgorithm ::= AlgorithmIdentifier { {OAEP-PSSDigestAlgorithms} } MaskGenAlgorithm ::= AlgorithmIdentifier { {PKCS1MGFAlgorithms} } PSourceAlgorithm ::= AlgorithmIdentifier { {PKCS1PSourceAlgorithms} }

OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-sha1 PARAMETERS NULL }| { OID id-sha224 PARAMETERS NULL }| { OID id-sha256 PARAMETERS NULL }| { OID id-sha384 PARAMETERS NULL }| { OID id-sha512 PARAMETERS NULL }| { OID id-sha512-224 PARAMETERS NULL }| { OID id-sha512-256 PARAMETERS NULL }, ... -- Allows for future expansion -- } PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-mgf1 PARAMETERS HashAlgorithm }, ... -- Allows for future expansion -- } PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-pSpecified PARAMETERS EncodingParameters }, ... -- Allows for future expansion -- } EncodingParameters ::= OCTET STRING(SIZE(0..MAX))

Note: the OAEPParameterSpec.DEFAULT uses the following:

 message digest  -- "SHA-1"
 mask generation function (mgf) -- "MGF1"
 parameters for mgf -- MGF1ParameterSpec.SHA1
 source of encoding input -- PSource.PSpecified.DEFAULT

Since:

1.5

See Also:

MGF1ParameterSpec, PSource

• Field Summary

Fields

• Constructor Summary

Constructors

• Method Summary

Methods declared in class java.lang.Object

[clone](../../../java/lang/Object.html#clone%28%29), [equals](../../../java/lang/Object.html#equals%28java.lang.Object%29), [finalize](../../../java/lang/Object.html#finalize%28%29), [getClass](../../../java/lang/Object.html#getClass%28%29), [hashCode](../../../java/lang/Object.html#hashCode%28%29), [notify](../../../java/lang/Object.html#notify%28%29), [notifyAll](../../../java/lang/Object.html#notifyAll%28%29), [toString](../../../java/lang/Object.html#toString%28%29), [wait](../../../java/lang/Object.html#wait%28%29), [wait](../../../java/lang/Object.html#wait%28long%29), [wait](../../../java/lang/Object.html#wait%28long,int%29)

• Field Details

  • DEFAULT

  The OAEP parameter set with all default values.

• Constructor Details

  • OAEPParameterSpec

  Constructs a parameter set for OAEP padding as defined in the PKCS #1 standard using the specified message digest algorithm mdName, mask generation function algorithm mgfName, parameters for the mask generation function mgfSpec, and source of the encoding input P pSrc.
  Parameters:
  mdName - the algorithm name for the message digest.
  mgfName - the algorithm name for the mask generation function.
  mgfSpec - the parameters for the mask generation function. If null is specified, null will be returned by getMGFParameters().
  pSrc - the source of the encoding input P.
  Throws:
  [NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if mdName,mgfName, or pSrc is null.

• Method Details

  • getDigestAlgorithm

  public String getDigestAlgorithm()
  Returns the message digest algorithm name.
  Returns:
  the message digest algorithm name.

  • getMGFAlgorithm

  public String getMGFAlgorithm()
  Returns the mask generation function algorithm name.
  Returns:
  the mask generation function algorithm name.

  • getMGFParameters

  Returns the parameters for the mask generation function.
  Returns:
  the parameters for the mask generation function.

  • getPSource

  Returns the source of encoding input P.
  Returns:
  the source of encoding input P.